Stereoscopic microscope

Abstract

A stereoscopic microscope includes a binocular eyepiece arrangement, a binocular magnification changer, and a monocular lens arrangement. A reversal lens system can be inserted into beam paths in front of or behind the magnification changer, whereby it exchanges the two beam paths against one another and at the same time causes an image reversal. Thus, the microscope enables quick and simple changing between two focusings of the microscope without limiting the operation of the magnification changer. A supplementary lens can be inserted on the input side of the lens arrangement into the beam paths and an optic system can be inserted into the beam path between the supplementary lens and the eye for wide-angle viewing of the retina. The supplementary lens is a convex lens, the focal length of which is chosen in such a manner that the retina can be viewed with the microscope through the inserted supplementary lens and the optic system, while the lens arrangement of the microscope is focused on the cornea.

What is claimed is:  
     
       1. A stereoscopic microscope comprising: a binocular lens arrangement, a binocular magnification changer, a monocular lens arrangement, and a movable reversal lens system for selective insertion into two beam paths in front of or behind the magnification changer, the reversal lens system exchanging the two beam paths against one another and causing at the same time an image reversal, the improvement comprising a supplementary lens for selective insertion or movement into an input beam path on an input side of the lens arrangement, and an optic system for selective insertion into the input beam path between the supplementary lens and an eye being tested for wide-angle viewing of a retina, the supplementary lens comprising a convex lens having a focal length being chosen or preselected so that the retina is viewable through the supplementary lens and the optic system of the microscope, while the lens arrangement of the microscope is focused on the cornea. 
     
     
       2. The microscope according to claim  1 , wherein the reversal lens system and the supplementary lens are coupled with one another at least one of mechanically, electromechanically or electronically so that the reversal lens system and the supplementary lens are capable of simultaneous insertion into the beam paths and the input beam path, respectively. 
     
     
       3. A stereoscopic microscope for use in ophthalmology examinations, comprising: a binocular lens arrangement, a binocular magnification changer, a monocular lens arrangement, and a reversal lens system for insertion or movement into two beam paths in front of or behind the magnification changer, the reversal lens system exchanging the two beam paths against one another and causing simultaneously an image reversal, an optic system for selective insertion into an input beam path between the lens arrangement and an eye under examination for wide-angle viewing of a retina, the optic system reproducing a first image for viewing with the microscope at a point between the lens arrangement and the optic system, the microscope including a supplementary lens for selective insertion or movement into the input beam path on an input side of the lens arrangement, the supplementary lens comprising a dispersing lens having a focal length selected for viewing the cornea, while the lens arrangement of the microscope is focused at the point of the first image. 
     
     
       4. The microscope according to claim  3 , wherein the reversal lens system and the supplementary lens are coupled with one another at least one of mechanically, electromechanically or electronically so that the supplementary lens and the reversal lens system are only capable of alternate insertion into the beam paths and the input beam path, respectively. 
     
     
       5. A stereoscopic microscope comprising: 
       an eyepiece arrangement;  
       a magnification changer;  
       a movable reversal lens system for selective insertion or movement into two beam paths in front of or behind the magnification changer, the reversal lens system exchanging the two beam paths against one another to cause an image reversal;  
       a lens arrangement;  
       a movable supplementary lens for selective insertion or movement into an input beam path on an input side of the lens arrangement; and  
       an insertable optic system for selective insertion or movement into the input beam path between the supplementary lens and an eye being tested for viewing of a retina.  
     
     
       6. The microscope according to claim  5 , wherein the optic system reproduces a first image at a point for viewing with the microscope, the lens arrangement of the microscope being focused on the point of the first image. 
     
     
       7. The microscope according to claim  6 , wherein the supplementary lens comprises a dispersing lens having a focal length selected for viewing the cornea, enabling the stereoscopic microscope to change between views of the cornea and views of the retina without focusing. 
     
     
       8. The microscope according to claim  6 , wherein the reversal lens system and the supplementary lens are coupled with one another so that the reversal lens system and the supplementary lens are capable of simultaneous insertion into the two beam paths and the input beam path, respectively. 
     
     
       9. The microscope according to claim  5 , wherein the supplementary lens comprises a dispersing lens having a focal length selected for viewing the cornea. 
     
     
       10. The microscope according to claim  5 , wherein the reversal lens system and the supplementary lens are coupled with one another so that the reversal lens system and the supplementary lens are capable of simultaneous insertion into the two beam paths and the input beam path, respectively. 
     
     
       11. The microscope according to claim  5 , wherein the lens arrangement has a focal length selected for viewing the cornea. 
     
     
       12. The microscope according to claim  5 , wherein the optic system reproduces a first image at a point for viewing with the microscope, the supplementary lens of the microscope being focused on the point of the first image. 
     
     
       13. The microscope according to claim  12 , wherein the supplementary lens comprises a convex lens. 
     
     
       14. The microscope according to claim  13 , wherein the lens arrangement has a focal length selected for viewing the cornea, enabling the stereoscopic microscope to change between views of the cornea and views of the retina without additional focusing. 
     
     
       15. The microscope according to claim  5 , wherein the reversal lens system and the supplementary lens are coupled with one another so that the supplementary lens and the reversal lens system are only capable of alternate insertion into the two beam paths and the input beam path, respectively.